I am trying to build a robot chassis that uses two motors.
I need approximately 0.4Nm of Torque per motor during operation
I want to use the following TT Gear Motors:
However I do not understand the torque specification of these motors.
According to [1-4] these motors have a
Stall Torque (6V): 0.8kg.cm
which I believe is ~ 0.078Nm
However, According to [1-4] these motors also have a
Torque: 0.15Nm ~0.60Nm
which i assume means (Torque: 0.15Nm to 0.6Nm)
which in my POV does not make sense - isn't stall torque meant to be greater than (What i assume to be) operating torque?
I would greatly appreciate your help (from anyone who has used these motors before)
Stall torque is the only torque parameter that has any meaning
Both the Stall Torque 0.8kg-cm spec and Torque: 0.15Nm ~0.60Nm spec are both stall torques. Specifying two makes no sense.
For number 4 if you look at the Adafruit site they only specify the stall torque 0.8Kg-cm.
Thanks for the reply. Adafuit specifies both "Torque: 0.15Nm ~0.60Nm" and "Stall Torque (6V): 0.8kg.cm". So if Stall torque = 0.8kg.cm then what is this other torque value and how is it above the stall torque?
Thanks for clarification and reply. Should I assume that [1-4] have all made an error when stating "Torque: 0.15Nm ~0.60Nm" and the true stall torque is given by Adafruit.
No. There are many different variations of that motor with several different gearbox ratios and dc motors. They all have different torques.
If you see a website that specifies several torques without any qualifications such as the voltage, current or speed at the specified torques then just don't buy a motor from that website
Well Core electronics seem to be a reputable distributer and they do state that the brand is Adafruit, so I assume they just made a copy and paste mistake
However it seems everywhere I look they all say 0.15Nm ~0.60Nm even ones with higher stall torques.
